During the war of spanish succession, why was charles ii's succession to the spanish throne made more difficult after he was made holy roman emperor?

The problem was that Charles II did not have an heir.  The French wanted Duke Philip to succeed the throne while the Hapsburgs recommended Archduke Charles to the throne.  Both sides had firm claims and this would affect the balance of power in the area.

it further strained relations between the north and the south and convinced

answer; i believe its (cpr);